Draw-gear and buffing apparatus.



' J. H. MCCORMICK.

DRAW GEAR ND BUFFING APPARATUS.

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Patented Oct. 28, 19.13.

l A i 57 n i Fig.1.

i nuns "I r A 4 I I I I 4 lift JOHN H.1VIOCOR1V[ICK,

0F COLUMBUS, OHIO.

DRAW-GEAR AND BUFFING APPARATUS.

T 0 all whom it may concern Be it known that 1, JOHN ll. McConMicK, a citizen of the United States, residing at Columbus, in the county' of Franklin and 'State of Uhio, have invented certain new and useful improvements in Draw-Gear and liniiing Apparatus, of which the following is a sp'e'citic'ation. I I y invention relates to the improvement of that class of draw gear and buffing ap' paratus in which friction resistance is employed in connection with a resisting spring to reduce shrcks and prevent rebound that result from cars meeting in violent contact. with each other, and my invention has particular relation to the improvement of that type of draw gear and butling apparatus which is shown in my former Patent #719,949 of February 3rd, 1.903. r

The object of my present invention is to provide an improved construction and arrangement of friction elements and means for effectively absorbing shocks; to provide an improved construction whereby the movable partsxofmy device are retained in proper alinetnent regardless of the inequalities in construction of the car or of the lateral or swinging movement of the car andto provide other improvements the details of which will be more fully pointed out hereina f ier.

These objects I accomplish in. the manner illustrated in the accompanying drawing, in which:

Figure 'l is acentral longitudinal section of my improved bailing apparatus, Fig. 2 is a sectional-plow on line m--m of Fig. l, and, Fig. 3 is a transverse section on line y-y ofFig. l.

Similar numerals refer to similar parts throughout the several views;

in carrying out my invention it employ opposing external or outer end follower bodies 1, the central and inner side socltet or. depression of each of whichhas its inner corner portion formed with a slightly rounded bevel, as shown at l. The followers 1 are engaged by suitable fixed carriers 2 of the car.

3 represent opposing wedging devices, each of'which is in the nature of a subst'aiitially cup-shaped body, the outer portion of which is of reduced diameter as indicated at 3. The reduced portions of the wed ing bodles 3 are contained in the recesses o the external followers 1, the ends of said re- Specification of Letters Patent.

Application filed June 8, 1908.

Patented Oct. 28,1913.

Serial No. 437,307.

duced portions being formed with rounded corners which are adapted to contact with the rounded surfaces 1 of the follower recesses.

As indicated in the drawing each of the wedging bodies 3 is of a substantially cupshape, the inner reduced portion thereof being formed with two inwardly projecting oppositely located wings 4, the outer faces of which are inclined as indicated at l to form wedging surfaces. It will be noted that the wedging wings 4 of one of the bodies 3 occupy positions at right angles with those in the remaining or opposing wedging body. \Vithin the \vedgin; cups or bodies 3, I provide four friction segments, two of which are indicated at 5 and the remaining two of which are indicated at 6. These segments are in the nature of elongated half-round bodies, which when fitted together, form a substantially round body, as shown more clearly in Fig. 3 of the drawing.

The upper and lower friction segments 6 are formed at one end with inclined wedging faces 6, while the opposite ends of the segments are similarly inclined, the inclined portions being indicated in Fig. 2 of the drawing at 5. Each of the segments 6 has projecting therefrom adjacent to its wedging end a lug 7 and each of the. seg ments 5 is likewise provided near its wedging end with a projecting lug 3, these lugs extending within pockets or within said rccesses 9 of the wedging bodies 3. Between the lugs 7 and lugs 8 is interposed a coiled s ring 10, the latter surrounding the friction segments, as shown, and having its.

end portions contained within the enlarged outer end portions of the wedging cups 3.

in the construction of the reduced portions 3* of the wedging bodies 3, the inner surfaces thereof which are not occupied by the Wings t are tapered slightly toward the inner end of the body and the outersurfaces of the friction segments are corre spondingly tapered toward their outer end portions 'ormmg friction faces that are at the same time Wedging faces. Assumin that the shock imparted is in the direction of the arrow in Figs. 1 and 2 of the drawing, it will be understood that the 191F081 sure of the external follower 1 at the oft, againstthe wedgin'g body 3 with which the corresponding ends of the friction segments 5 are in engagement, Wlll result in a hor1- iii zontal movement of said segments a which through the lugs8 will cause a compression of the spring against the opposite wedging body 3 and in a-corresponding movement of the members 6 until the latter contact with the beveled surfaces 4'. nection it will be noted that a space normally exists betweenthe bevels e 3 an i, thus permitting of a preliminary spring movement Without friction between the members 5 and 6] The compression of the spring will be I followed by the wedging engagement of the.

:inclined surfaces 6 of the'segments 6 and the, inclined surfaces 4 of the Wedging' wings 4 at the corresponding end of the apparatus. In addition to the wedging action described, it willbe readily understood that an increased frictional engagement of parts will be attained'through the engagement of 'the inclined inner surfaces of the wedging cups 3 and inclined external surfaces of the friction segments. It is also obvious that the'frictional engagement of the various elements or parts heretofore mentioned, must ;tion". segments 5 and 6 with each other and that the engagement described of the various friction and wedging parts, in conjunction result; in a frictional engagement of the fric with the spring 10, Will serve to absorb the shock or jar resulting from the impact or sudden contact of two cars or heavy bodies.

@It will be readily understood that when the jar is imparted in-the opposite direction from that described, similar engagements of the various pa ts of mydevice will occur in the reverse manner. V c Owing to the fact that the bearing ends of the wedging bodies 3 are provided with roundedcorner ortions which. b'ear against the rounded sur aces 1 of the recesses of the followers 1, it will be seen'that lateral or swinging movement of the followers which may be due to the movement 'of the cars about curves or may be due to' irregularities in the parts of the cars-With which the carriers are connected,-{will. not affect the horizontal movement of the wedging bodies and the cqualdistribution of the pressures on all the parts of nay device.

In the specification and claims, I have for the sake' of' convenience used the term \vcdgin'g faces and wedgin'g friction faces one in contradistinction to the other. By the term Wedging faces, I mean the acutely tapered faces 4' against which bear the corresponding acutely tapered ends 5" In this conand 6 By wedging friction faces Imean the inner faces of the reduced portions 3 of the wedging bodies 3 which are tapered but slightly, so that the correspondingly slightly tapered ends of the friction'segnients will travel or move therein to the full 1. In a friction draft and buiiing apa paratus, the combination with the friction elements, of a spring inclosing' the friction elements and having only end contact with said friction elements, and means for pressing the contacting friction elements'in-opposite directions-and? against each other.

2. In a friction draft and buifing apparatus, the combination with opposite wedging'devices thatlimit the closing movement of'each other by direct contact with each other, of a plurality of intermediate friction elements engaging said wedging devices at each end, and a spring resisting the movement of the contacting friction ele-- ments from opposite directions.

3. In a friction draft'rand buffing apparatus, the combination with opposite wedging devices, of a plurality of intermedi- 9O a e friction elements that normally contact, with the wedging faces of one Wedging ale-- vice" only, and a spring contacting directly with the other wedging device and all the friction elements.

4. In a friction dr aft and bufling apparatus, the combination with a plurality of friction elements, of means for wedging the friction elements against each other, and of followers having pivotal engagement with the wedging means. Y

5. -In a friction draft and buiiing apparatus,- the combination with a plurality of friction elements, of means for pressing the friction elements against each other, and a pivotal follower.

In testimony whereof I affix my signature in presencc of two wltnesses.

JOHN H. MCCORMICK. Witnesses:

Copies of this patent may be obtained for flve cents each, by addressingthe Commissioner of Patents, Washington, .D. 0. 

